Self-cross-linkable acrylic polymer containing hydroxyalkyl carbamate groups and coating compositions containing the same
US4758632A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1985 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Feb 6, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A self-cross-linkable acrylic polymer contains at least two hydroxyalkyl carbamate groups per molecule and may comprise the reaction product of an acrylic backbone polymer containing one or more suitable reactive groups and an amine containing one primary or secondary amine group and at least one hydroxyalkyl carbamate group or precursor thereof. Alternatively, the self-cross-linkable polymer may be obtained by polymerization of an acrylic polymerizable monomer containing at least one hydroxyalkyl carbamate group. The amine is joined to the monomer or backbone polymer by reaction of the primary or secondary amine group thereof with suitable reactive functional groups of the monomer or resin. A method of making the acrylic polymer, which is heat curable to provide a thermoset film or coating, comprises reacting the monomer or backbone polymer with an amine containing hydroxyalkyl carbamate groups or precursors thereof comprising hydrolyzable blocked primary amine groups. When present, the blocked groups are unblocked and reacted with a cyclic carbonate to form the hydroxyalkyl carbamate groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.